Type-writing machine.



H. GLABSER.

TYPE WRI\TING MACHINE. APPLICATION IILEi) MAR. 19, 1910.

Patented Nov. 8, 1910.

I Invanl 'oo Fig.4.

- cured by suitable devices.

j with myinvention.

UNITED STATES HENRY GLAESER, OF JERSEY CITY, NEW

WRITER COMPANY, OF NEW YORK, N.

JERSEY, ASSIGNOR TO UNEERWOOD TYPE- Y., A CORPORATION OF NEW JERSEY.

TYPE-WRITIN G MAGHIN E.

Specification of Letters Patent.

Patented Nov. 8, 1910.

Application filed March 19, 1910. Serial No. 550,449.

To all whom it may concern:

Be it known that I, HENRY GLAESER, a citizen of the United States,residing in Jersey City, in the county of Hudson and State of NewJersey, have invented certain new' and useful Improvements inTypeJVriting Machines, of which the following is a specification,

This invention relates to devices for releasing the platens from thecontrol of the line space Wheels in typewriting machines.

The mainobject of the invention is to provide a simple, compact, easilyoperated. inexpensive and readily applicable device 0 this character.

In the preferred form of the invention, a radially movable dog iscamined forcibly against the inner periphery of the hub of theline-space wheel, for binding the latter to the platen axle; theoperation of the dog being effected by means of a cam carried upon theinner end of a sliding'stem, which is inserted within the enlarged endof the platen axle; a nut being threaded upon the outer end of said stemto bear against the end of the platen axle, and thereby effect thedesired movement of the stem.'

A finger-wheel for turning the platen is preferably fixed upon theplaten axle between the line-space wheel and said nut. Regulation of thethrow of the stem is se- In the accompanying drawings, Figure 1 is aplan view of the platen frame of an Underwood typewriting machine,equipped tional view, showing the clutch released to disconnect theplaten and line-space wheeh Fig. 3 is a similar view, showing the clutchconnecting the platen and line-space wheel. Fig. 4 is a erspective viewof the-compd ncnt parts disassembled.

The usual platen 1 is secured to an axle 2 journaled in the ends 3, 3 ofa platen frame. A toothed line-space wheel 4 engaged by a spring detent.5, is operated by a lever 6 through a slide 7 and pawl 8, to effect theline-spaeingof the platen.

One end of the axle is provided with a hollow cylindrical head 9 passingloosely through the line-space wheel, which may be 'su ported thereon bya hub 10.

0 look or clutch'the laten to the linespace wheel, a clutch mom or inthe form of a dog'12, is loosely fitted in a slot 11, to move Fig. 2is adetail sec into and out of binding or clutching engagement with the hubor sleeve 10 ofthe line- I space wheel. Said slot is so narrow as to lreceive snugly the dog 12, to prevent relative sidewise movement, thehead 9) between the dog and the head, and hence between the axle andline-space wheel.

The dog or clutch 12 is caused to bite the bore of the hub or sleeve ofthe line-space wheel by a clutch operator in the form of a stomp-13f.having at its inner end a cam 13, within the hollow enlarged end or head9 of the axle. The dog preferably has a cam face 14 co-acting with thecam face 13 of the clutch operator, movement of which latter to the leftendwise or longitudinally of the platen axle. operates the dog to lockthe line space wheel to the platen; movement of the clutch operator tothe right, operating to release the platen from the line-space wheel.

The cam 13 is controlled by a finger-piece 15, in the form of a nut orcap threaded on a nipple 1G projecting from the stem 13 connected to theclutch-operating cam 13. Said nut or finger-piece bears against the endof the axle, and causes the cam member to force the dog outwardly andbind forcibly against the inner face of the hub 10 of i the line-spacewheel. The frictional engagement of the finger-piece with the axle.against which it is drawn by the threads, enables said finger-piece toserve as a loclc nut to hold the parts firmly connected, as in Fig. 3.

To release the line-space'wheel, it is only necessary to turn thefinger-piece in the opposite direction.

To prevent the finger-piece 15 from being turned completely off from thenipple 16, a stop 17 is threaded into said finger-piece, to

engage a shoulder or stop 18 formed on the the head 9 to. regulate .themovement of 13 and hence the strength of' the Wedging aeti on of the dogagainst the space-wheel hub.

The rotative adjustment of said hub 19 tofirmly against the line-spacewheel.

For coarse adjustments, the stop 17 may be removed fromthe cap orfinger-piece 15',

and the latter turned farther on or off the threaded nipple 16 of thecam, to increase or decrease the effectiveness of the cam act-ion, afterwhich the stop is replaced.

It will. be observed that-the dog 12 operates as a key in the slot 11 toprevent rela' tive turning of 'the line-space wheel and platen, whenbinding against the inner face of the hub 10 of the line-space wheel,and to admit of their relative rotation when desired. a

t It will also be noticed that the. employmentof springs or otherresilient devices has been avoided, and that but few parts are used,thereby reducing their liability to get out-of order. I

-Var'iations may he resorted to within the scope of the invention, andportions of the improvements may be-used withoutother's.

Having thus described my invention, I claim: 7

l. In a typewriting-machine, the combina- I tion with a platen fixedonan'axle, a .linespace w'heel relative to which the platen turns, of adog to releasably connect the platen and line-space Wheel, a-clutchoperator in contact with the dog, a fin er-piece threaded to the clutchoperator an engage ing a stationary part, to control the dog and a stopadjustable about the axle, to arrest the rotation of the finger-piece. v

2. In a typewriting machine, the combination with an axle having aplaten fixed thereto, a line-space wheel relative to which i the platenturns, of a dog to-bite upon the hub of the linespace wheel, aclutchoperator to effect the engagement and disengageflinent of the dogand line-space wheel, a. hand-wheel adjustable on the axle and having ahub, a finger-piece threaded on the clutch operator and having a stop,to be ar! rested by a shoulderon the hub of the Wheel to prevent thedisengagement of the fingerpiece and clutch operator.

3. In a typewritmg machine, thecombina tion with an axlehaving a platenfixed thereto, a line-space wheel relative to which the platen turns, ofa dog to bite upon the hubof the line-space Wheel, a clutch operatortoeffect the engagementand disengagement of the dog and line-space wheel,a-

hand-wheel having a-hub, a finger-piece threaded .on the clutch operatorand having l a stop, to be arrested by. a shoulder on the hub of thewheel to prevent the disengagement of the finger-piece and clutchoperator.

. HENRY GLAESER. Vitnesses: 5 K; FRANnFon'r, RIPLEY.

